So I'm trying to tune my 11 6.0 Silverado and get it decent enough to make a trip to the dyno and get it dialed in. Truck norris cam, CNC 317 heads, longtubes, ported TBSS intake.
Ive adjusted the engine size and the injector data is correct according to the data I have for 50# flex injectors. I pulled a few degrees of timing from the base table and started with MAF tuning (it was running extremely rich) and got it alot closer than it was. I had to disable the O2's by manually unplugging them and turning off the codes, also disabled COT, and dynamic air. I'm tuning using an AEM WB, and I thought I got it pretty close so I started trying to clean up the VVE table.
My VVE adjustments seem to me to have been rather minor. I noticed I start having what sounds like a lean pop in the intake so I turned the MAF back on and went back to MAF tuning and the tune was again off. I noticed it I let it idle long enough, it will eventually start going lean while I'm running the scanner. I also noticed that some cells in my EQ ratio error histogram will want several precent more fuel. When I do it again, it'll want several percent less.
I noticed my MAF hz is around 3700 at a 725 RPM idle which is higher than some other peoples engines (engine size maybe?) but I wonder if its an issue...my CAI has a plastic cone inside (doesnt fit real well at that) just before that MAF that reduces the intake tube diameter but also biases airflow towards the MAF sensor. This insert is removable and I'm wondering if this is intended to be used for smaller displacement engines. I can't find anything on this, and am not sure if it's a good idea to remove it.
Maybe i'm overthinking this? I'd like to figure this out before I spend too much time trying to make it run better with the current cost of gas. If I'm going to do that I might as well put on the ported TB I have as well.
It is at least drivable. Its definitely better than it originally was. It still likes to pop under high load low RPM situations between 1400-2000 RPM. Here's a copy of the current calibration if anyone wants to take a look.
Far from the first engine I've built, but I'm just trying to build a basic skillset in tuning with the intent to create a safe tune until I can get it on a dyno and have it dialed in. I haven't done much yet with timing on it, havent gotten that far yet.